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    <title>h_norm</title>
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    <center>Scilab Function</center>
    <div align="right">Last update : April 1993</div>
    <p>
      <b>h_norm</b> -  H-infinity norm</p>
    <h3>
      <font color="blue">Calling Sequence</font>
    </h3>
    <dl>
      <dd>
        <tt>[hinfnorm [,frequency]]=h_norm(sl [,rerr])  </tt>
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    <h3>
      <font color="blue">Parameters</font>
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    <ul>
      <li>
        <tt>
          <b>sl</b>
        </tt>: the state space system (<tt>
          <b>syslin</b>
        </tt> list)</li>
      <li>
        <tt>
          <b>rerr</b>
        </tt>: max. relative error, default value <tt>
          <b>1e-8</b>
        </tt>
      </li>
      <li>
        <tt>
          <b>hinfnorm</b>
        </tt>: the infinity norm of <tt>
          <b>Sl</b>
        </tt>
      </li>
      <li>
        <tt>
          <b>frequency</b>
        </tt>: frequency at which maximum is achieved</li>
    </ul>
    <h3>
      <font color="blue">Description</font>
    </h3>
    <p>
    produces the infinity norm  of a state-space system 
    (the maximum over all frequencies of the maximum singular value).</p>
    <h3>
      <font color="blue">See Also</font>
    </h3>
    <p>
      <a href="linfn.htm">
        <tt>
          <b>linfn</b>
        </tt>
      </a>,&nbsp;&nbsp;<a href="linf.htm">
        <tt>
          <b>linf</b>
        </tt>
      </a>,&nbsp;&nbsp;<a href="../control/svplot.htm">
        <tt>
          <b>svplot</b>
        </tt>
      </a>,&nbsp;&nbsp;</p>
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